Add `ODIN_ERROR_POS_STYLE` constant and change `runtime.print_caller_location` based on that constant

core/runtime/print.odin

@@ -143,11 +143,21 @@ print_int     :: proc "contextless" (x: int)     { print_i64(i64(x)) }
 
 print_caller_location :: proc "contextless" (using loc: Source_Code_Location) {
 	print_string(file_path)
-	print_byte('(')
-	print_u64(u64(line))
-	print_byte(':')
-	print_u64(u64(column))
-	print_byte(')')
+	when ODIN_ERROR_POS_STYLE == .Default {
+		print_byte('(')
+		print_u64(u64(line))
+		print_byte(':')
+		print_u64(u64(column))
+		print_byte(')')
+	} else when ODIN_ERROR_POS_STYLE == .Unix {
+		print_byte(':')
+		print_u64(u64(line))
+		print_byte(':')
+		print_u64(u64(column))
+		print_byte(':')
+	} else {
+		#panic("unhandled ODIN_ERROR_POS_STYLE")
+	}
 }
 print_typeid :: proc "contextless" (id: typeid) {
 	if id == nil {

src/build_settings.cpp

@@ -168,6 +168,8 @@ enum TimingsExportFormat : i32 {
 enum ErrorPosStyle {
 	ErrorPosStyle_Default, // path(line:column) msg
 	ErrorPosStyle_Unix,    // path:line:column: msg
+
+	ErrorPosStyle_COUNT
 };
 
 // This stores the information for the specify architecture of this build

src/checker.cpp

@@ -893,6 +893,16 @@ void init_universal(void) {
 		add_global_enum_constant(fields, "ODIN_ENDIAN", target_endians[bc->metrics.arch]);
 	}
 
+	{
+		GlobalEnumValue values[ErrorPosStyle_COUNT] = {
+			{"Default", ErrorPosStyle_Default},
+			{"Unix",    ErrorPosStyle_Unix},
+		};
+
+		auto fields = add_global_enum_type(str_lit("Odin_Error_Pos_Style_Type"), values, gb_count_of(values));
+		add_global_enum_constant(fields, "ODIN_ERROR_POS_STYLE", build_context.ODIN_ERROR_POS_STYLE);
+	}
+
 
 	add_global_bool_constant("ODIN_DEBUG",                    bc->ODIN_DEBUG);
 	add_global_bool_constant("ODIN_DISABLE_ASSERT",           bc->ODIN_DISABLE_ASSERT);